grief tonight we're learning more about the shooter and his rants about being ignored by women. A hidden world of resentment and anger against women where one distured young man took refuge. ABC's David right on that. Reporter: Over the past few days a outpouring. Girls Reporter: Yes, all women feel threatened. Every woman I know has experienced some form of sexual harassment abuse or assault. Myself included. Every single woman I know has a story about a man feeling entitled to access to her body. Reporter: More than 1 million tweets shining light on a culture that turns women into sex objects. A cottage industry of pickup artists selling cynical tips for the modern cave man. If you're not finding every angle to get the girl, she's going to go home with a . Reporter: This video is called be the Ted Bundy of pick upand killer incidence stingtd that will get you laid ten out of ten times. Clearly didn't work for Rodger. Still a virgin at 22. I don't know why you girls aren't atraktded to me. Reporter: Hard not to look at this guy's video and say he hates women. Yeah, I think he hated women for sure. Reporter: Richard who runs one of the most successful pickup artist sites told us most of his clients don't hate women. They're just lonely. The dates involved is tough. There are a lot of depressed lonely people out there. Reporter: In most cases it doesn't end in a bloody rampage. No, in most cases it doesn't. Reporter: Santa Barbara wasn't just another sir Mitch. This is a terrorism. And ABC news will be staying on this story.

This transcript has been automatically generated and may not be 100% accurate.

Now Playing: Air Canada Jet Crashes 1,000 Feet Short of the Runway in Halifax Snow Storm

Now Playing: Big Stakes Nuclear Talks With Iran

Now Playing: Wild Spring Break Party in Florida Turns Violent When Gunshots are Fired

Now Playing: {{itm.title}}

{"id":23889798,"title":"Disturbed Mind of Elliot Rodger","duration":"1:59","description":"An investigation into the hidden culture that may have helped stir his anger towards women.","url":"/WNT/video/disturbed-mind-elliot-rodger-23889798","section":"WNT","mediaType":"Default"}